diff --git a/XADISO9660Parser.m b/XADISO9660Parser.m
index 23f38c2e..f936c2b0 100644
--- a/XADISO9660Parser.m
+++ b/XADISO9660Parser.m
@@ -407,7 +407,7 @@ -(void)parseDirectoryWithPath:(XADPath *)path atBlock:(uint32_t)block
 		if(flags&0x04) [dict setObject:[NSNumber numberWithBool:YES] forKey:XADIsDirectoryKey];
 
 		int systemlength=recordlength-33-namelength-((namelength&1)^1);
-		if(systemlength)
+		if(systemlength>0)
 		{
 			NSMutableData *namedata=nil;
 			NSMutableData *linkdata=nil;